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7197146 Microphone array signal enhancement  
A system and method facilitating signal enhancement utilizing an adaptive filter is provided. The invention includes an adaptive filter that filters an input based upon a plurality of adaptive...
7194027 Channel equalizing and carrier recovery system for home phoneline networking alliance receiver and method thereof  
A channel equalizing and carrier recovery system for home phoneline networking alliance (HomePNA) receiver and method thereof are provided. The channel equalizing system includes a frequency...
7173967 Method for determining the filter coefficients of a digital time domain equalizer for a multicarrier frequency signal  
A vector space comprising all of the filter coefficients for different interfering signals is provided, based on an acquired impulse response. A linear vector sub-space comprising all of the...
7171436 Partitioned block frequency domain adaptive filter  
The partitioned block frequency domain adaptive filter according to the invention comprises a plurality of parallel arranged filter partitions. Each filter partition models a part of an impulse...
7167884 Multistage median cascaded canceller  
An adaptive signal processing system utilizes a Multistage Weiner Filter having an analysis section and a synthesis section that includes a processor. The processor includes an algorithm for...
7161528 Device and method for the suppression of pulsed wireless signals  
The invention relates to a method of suppressing pulsed signals in particular of DME or TACAN type present in the radio signals received (Ue) by a radio-frequency receiver, characterized in that...
7155469 Method of correcting physical impairments of a programmable filter  
In some embodiments of the present invention, a known input signal is fed to a programmable filter. The output of the filter is compared to a calculated desired output for the same or similar...
7154328 Nonlinear filter  
A system and method are disclosed for a nonlinear filter having a nonlinear transfer function. The nonlinear filter comprises a plurality of linear filters each having a filter output, a plurality...
7151796 High performance equalizer with enhanced DFE having reduced complexity  
An apparatus and method for implementing an equalizer which (1) combines the benefits of a decision feedback equalizer (DFE) with a maximum-a-posterori (MAP) equalizer (or a maximum likelihood...
7139311 Method and state reduction in an equalizer  
An equalizer apparatus comprises a first filter (406) having a first respective plurality of filter coefficients, a channel model filter (414) having a plurality of model filter coefficients, and...
7136413 Method and apparatus for generation of reliability information with diversity  
A receiver includes a Viterbi-like equalizer that provides diversity combining of soft values to produce reliability information. The output reliability information at time k is the average of the...
7136536 Adaptive filter  
An adaptive filter that, in one embodiment, filters rows of pixels of an image in a vertical direction, stores the results in row vectors, and then filters the row vectors in the horizontal...
7133886 Interactive adaptive filter and interactive adaptive filtering method thereof  
Provided is an adaptive filter that can reduce the computational complexity. The adaptive filter includes: a segmentation unit for segmenting N number of input signals into G number of signal...
7130875 Digital filter coefficient setting apparatus and digital filter coefficient setting method  
Herein disclosed is a digital filter coefficient setting apparatus which can search and select a specified filter coefficient element corresponding to a specified coefficient parameter inputted by...
7120657 System and method for adaptive filtering  
A method for analyzing data, the data characterized by a set of scalars and a set of vectors, to analyze the data into components related by statistical correlations. In preferred embodiments, the...
7107303 Sparse echo canceller  
An echo canceller includes an adaptive digital filter that generates an estimated echo signal {circumflex over (z)}[k] in response to (i) a sampled input data sequence x[k] and (ii) an error...
7103177 Reduced complexity transform-domain adaptive filter using selective partial updates  
A transform-domain adaptive filter uses selective partial updating of adaptive filter parameters. This updating may be based on a constrained minimization problem. The adaptive filter parameters...
7099385 Compensation for interference in data receivers  
A data communication receiver comprises an equalizer for adapting to each of a plurality of channels to open the eye for each channel in a Gigabit (1000BASE-T) transceiver. The eye is open for a...
7078872 System and method for conditioning a signal  
A method of conditioning a signal being communicated between a system to be controlled and a controller may include monitoring an actual output signal and conditioning the actual output signal....
7076513 Method and architecture for controlling asymmetry of an LMS adaptation algorithm that controls FIR filter coefficients  
A circuit (48) and method, which can be used in a mass data storage device, controls adaptation asymmetry of coefficients of an FIR filter (20) using an accumulator (52) or accumulating...
7069286 Solution space principle component-based adaptive filter and method of operation thereof  
The present invention provides an adaptive filter. In one embodiment, the adaptive filter includes a solution vector generator that develops a sparse expression of an initial solution vector. In...
7058676 Digital filtering methods and devices  
In order to transform an input digital signal (xn) into one or more output digital signals (yn) containing even-indexed samples (y2n) and odd-indexed samples (y2i+n), this filtering method...
7058185 Acoustic echo and noise cancellation  
Stereo echo cancellation is necessary to overcome the objections observed by, for example, teleconferencing, voice controlled video/audio apparatuses, etc. To improve the existing filters, an...
7053787 Slickline signal filtering apparatus and methods  
A signal filtering apparatus and associated methods enable noise to be significantly reduced or eliminated from a signal. In a described embodiment, the signal is indicative of tension in a...
7043512 Filter bank approach to adaptive filtering method using independent component analysis  
The present invention relates to a filter bank approach to adaptive filtering method using independent component analysis. More particularly, the invention relates to a method of improving the...
7028061 FIR filter and setting method of coefficient thereof  
An FIR filter and setting method of filter coefficients thereof enabling the prevention of breakdown of equi-ripple of weighted approximation error and preservation of gain of the pass band into...
7027504 Fast computation of decision feedback equalizer coefficients  
Optimal Decision Feedback Equalizer (DFE) coefficients are determined from a channel estimate h by casting the DFE coefficient problem as a standard recursive least squares (RLS) problem, e.g.,...
7023910 Dual-line DSL system and method  
A dual-line DSL system comprises a central office and a customer premises coupled by at least two communication paths that together provide a single high-bandwidth channel. An ADSL transceiver...
7006565 Hybrid soft and hard decision feedback equalizer  
An equalizer for use in a communication receiver includes an infinite impulse response (IIR) feedback filter operated in acquisition and tracking feedback modes on a sample by sample basis to form...
6996168 Signal-processing circuit, and recording and playback apparatus employing the same  
A signal-processing circuit in which two-stage equalization is performed by using first and second equalization circuits provided on upstream and downstream sides from a phase-locked loop circuit,...
6988116 Method of designing polynomials for controlling the slewing of adaptive digital films  
A method for deriving a polynomial for generating filter coefficients to be used in a digital filter in an electronic unit having a digital signal processor. The digital filter has a plurality of...
6985522 Variable-gain digital filter  
A variable-gain digital filter includes a selector and multiplier arranged inside the digital filter for regulating gain whereby the number of bits of filter input is X, the number of flip-flops...
6976044 Narrowband interference canceller for wideband communication systems  
A method and apparatus for adaptively removing interference from a signal. In one embodiment, the invention comprises an infinite impulse response (IIR) notch filter configured to receive a...
6976045 Variable sample rate recursive digital filter  
A variable sample rate recursive digital filter is an adaptive digital filter where its coefficients are recalculated for each sample rate being processed in such a way as to maintain a constant...
6963604 Blind equalizers using probability density matching and parzen windowing  
An iterative method of equalizing an input signal received over a digital communication channel can include (a) using a kernel density estimate where different values of a kernel size are...
6959219 Control apparatus having a limit cycle auto-tuning function  
A control apparatus includes a manipulated variable output unit, calculation unit, first lower limit setting unit, first upper limit setting unit, second lower limit setting unit, second upper...
6957240 Method and apparatus for providing an error characterization estimate of an impulse response derived using least squares  
A filter adaptation unit suitable for producing a set of filter coefficients is provided including an error characterization unit for characterizing the error in a filter's impulse response. The...
6954771 Adaptive line enhancer  
An improved adaptive line enhancer includes an adaptive Gray-Markel lattice notch filter having an adaptive notch frequency, in which the notch frequency is determined according to a notch...
6952446 Digital filter bank followed by monobit receivers for signal processing  
The present invention uses narrow-band monobit receivers after a digital filter bank to separate simultaneous signals in one channel. The invention improves the capability of wideband digital...
6950842 Echo canceller having an adaptive filter with a dynamically adjustable step size  
The present invention is directed to an echo canceller adapted for use in a communication system that includes a hybrid circuit. The echo canceller comprises an adaptive digital filter that...
6944220 Circuit configuration for the offset compensation of a signal  
For the offset compensation of a digital signal, particularly of a communication signal transmitted in a cordless digital communication system, a recursive digital filter is used. The recursive...
6904444 Pseudo-median cascaded canceller  
An adaptive signal processing system utilizes a pseudo-median cascaded canceller to compute a set of complex adaptive weights and generate a filtered output signal. The system includes a plurality...
6898255 Filter coefficient generator  
An apparatus and method for generating finite impulse response (FIR) filter coefficients are presented. The apparatus includes an address generator that multiplies a desired cutoff frequency f by...
6898238 Apparatus for, and method of, reducing power dissipation in a communications system  
A method is provided for reducing power dissipation within a communications system having a plurality of adaptive filters with a plurality of taps, each tap is switchable between an active and an...
6895094 Adaptive identification method and device, and adaptive echo canceller implementing such method  
The device receives an input signal xt and an observation signal yt, one component of which is the response of a system to the input signal. It determines an error signal et at an instant t in...
6889238 Parallel decimator adaptive filter and method for all-rate gigabit-per-second modems  
Parallel adaptive filters and filtering methods that enable processing of an input signal in a circuit that has an clock speed many times slower than the input rate of the input signal that is...
6865588 Adaptive filtering with tap leakage using error filtering  
In one embodiment of the invention, a tap-leakage generator includes an error filter and an updater. The error filter filters a decision error provided by the adaptive filter using a leakage...
6865270 Echo cancellation method and apparatus  
An echo cancellation invention which does away with the need for an accurate double-talk detector, while maintaining a higher adaptation gain for quicker convergence and also providing increased...
6856191 Nonlinear filter  
A system and method are disclosed for a nonlinear filter having a nonlinear transfer function. The nonlinear filter comprises a plurality of linear filters each having a filter output, a plurality...
6804695 Method and apparatus for constraining tap coefficients in an adaptive finite impulse response filter  
Method and apparatus for constraining tap coefficients in an adaptive Finite Impulse Response filter includes structure and steps whereby a coefficient supply circuit provides at least two even...